Some keys forget their font size

[a8bit]

I save my layout and it looks correct,

When I reload it, the three hilighted keys are the wrong font size!

https://gist.github.com/a8bit/378b15917a78b5e7ab4a59e2ee845c70

[a8bit]

I edited the raw json to add ",fa:[3]" to the three keyts that don't save their attributes and it saved that OK so it must be the generator that is missing something.